Na2O·xAl2O3 (x = 9, 11) films have been obtained by sol-gel method. Crystallization processes during heat treatments have been investigated by X-ray diffraction analysis. A metastable phase with the mullite structure, λ-Na2O·xAl 2O3, has been observed starting from 800°C. Films remained stable after a heat treatment at 1000°C for 250 h. Impedance spectroscopy measurements showed that the films of λ-Na 2O·xAl2O3 possess a large three-dimensional ionic conductivity at 400°C.

A., M., S., S., A., M., L., A., DI BARTOLOMEO, E., Traversa, E., et al. (2003). Sol-Gel Synthesis of λ-Na2O·xAl2O 3 Films. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 86(11), 1965-1968.

Sol-Gel Synthesis of λ-Na2O·xAl2O 3 Films

DI BARTOLOMEO, ELISABETTA;TRAVERSA, ENRICO;
2003-01-01

Abstract

Na2O·xAl2O3 (x = 9, 11) films have been obtained by sol-gel method. Crystallization processes during heat treatments have been investigated by X-ray diffraction analysis. A metastable phase with the mullite structure, λ-Na2O·xAl 2O3, has been observed starting from 800°C. Films remained stable after a heat treatment at 1000°C for 250 h. Impedance spectroscopy measurements showed that the films of λ-Na 2O·xAl2O3 possess a large three-dimensional ionic conductivity at 400°C.
2003
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
English
Crystal structure; Crystallization; Heat treatment; Ionic conduction; Sodium compounds; Sol-gels; Spectroscopic analysis; Synthesis (chemical); Thermodynamic stability; X ray diffraction analysis; X ray photoelectron spectroscopy, Mullite structure, Alumina
A., M., S., S., A., M., L., A., DI BARTOLOMEO, E., Traversa, E., et al. (2003). Sol-Gel Synthesis of λ-Na2O·xAl2O 3 Films. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 86(11), 1965-1968.
A., M; S., S; A., M; L., A; DI BARTOLOMEO, E; Traversa, E; M., G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/52601
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